Door-check



UNITED STATES ATENT rricn.

BENJAMIN T. RAISOR, OF CHICAGO, ILLINOIS.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 449,916, dated April 7, 1891.

Application filed June 9, 1.890-V Serial No; 354,737. (No model.)

To all whom z5 may concern:

Be it known that I, BENJAMIN T. RAIsoR, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Door-Checks; and I 'do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the let-ters of reference marked thereon, which form a part of this specification.

My invention relates to door-checks; and it consists in a novel arrangement of parts, as hereinafter set forth, whereby a springcontrolled plunger is normally in` frictional contact with the Hoor, and in a further novel device for refenforcing the spring.

In the accompanying drawings, Figure l shows a front elevation of my improved doorcheck. Fig. 2 is a vertical longitudinal section on the line 2 2, Fig. 1. Fig. 3 is a cross section on the line 3 3, Fig. 1. Fig. 4: is a crosssection on the line 4 4, Fig. l. Fig. 5 is a cross-section on the line 5 5, Fig. 2; and Fig. G is an elevation of the bed-plate of the device.

I have shown in the accompanying drawings a portion of the lock-stile A of a door, the door-jamb B, section of the floor O, and the threshold c.

My improved door-check is attached to the stile of the door; and it consists, in its principal features, of the casing or tube D, the bolt E, carried vertically within the casing and having its lower end enlarged and projecting from the casing, a friction-pad G, attached to the lower end of the bolt and adapted to bear against the ioor, and a spiral spring I-I, carried upon the smaller portion or shank ofthe bolt, the enlarged portion of the bolt serving as ashoulder to receive the end of the spring, the upper end of the latter reacting against a sliding sleeve N, mounted upon the bolt and normally abutting against the shoulder I in the casing. The form of the casing is not material. As shown, it is a U-shaped tube, the ends of the U being flanged laterally to receive the screws M, by which it is secured to the door. As the lower end of the casing protects the spring H and receives the v enlarged end of the bolt, it is larger than the secured to the door-stile by screws.

upper end. The offset incident to the difference in size between the upper and lower portions of the casing supplies the shoulder against which the sleeve N abuts. -A handle K projects laterally from the upper end of the bolt E through a longitudinal slot d in the casing. y By means of the handle K the bolt E is raised against the spring I-I. A recess 7c extends laterally from the upper end of the slot d for the purpose of receiving the handle K, so as to retain the bolt E when raised.

VThe friction-pad G may be of any suitable material, preferably of rubber. It should be secured to the lower end of the bolt E against any possibility of being displaced. -If of rubber it may be securely held in place by making it of such-size that compressionisneces l.

sary in forcing it within a socket in the lower end of the bolt, as shown.

v The sleeve N is provided with a lateral handle n, which may be cast integrally with it.

Thishandle projects through the slot n in the case. Atthe lower end of this slot there is a lateral recess n2 in the casing, within which the handle n may be secured.

A back plateO, corresponding in shape to the opening at the back part of the casing, is This plate has a concave face, so as to serve as a bearing for the bola-the upper portion of the plate being thicker than the lower portion, because the corresponding portion of the bolt is smaller than the lower portion thereof.

In adjusting the device to a door the lower end of the casing D should be flush with the lower edge of the door. The slot d is of sufiicient length to permit the pad Gto be drawn entirely within the casing D.

Vhen it is desired to bring the device into use, the handle K is drawn out of the recess 7c and the spring II forces the pad G down upon the ioor C, whereby the door is held in the position it occupies when the device is brought into action. Should some portions of the iloor be depressed below the general level, and as a consequence the spring I-I be found too weak to throw the bolt the required distance, the sleeve N may be forced down and its handle n caught within the recess n2, thereby greatly increasing the efticiencybf the spring.

The size of the device will vary with the door upon which it is to be used, or the strength of the closing-spring, if any, attached thereto. The spring I-I will be of such strength as to cause the pad G to bear upon the iioor with sufficient force to prevent the movement of the door, unless borne against with great pressure. It will be seen that if the door is moved when the pad is down there will be no injury to any of the parts or to the Hoor or its covering.

I am aware that a door-check having a downwardlyhprojecting plunger carrying a friction-pad and controlled by a spring is not new, and. I do not broadly claim such construction.

I do cla-im as my invention and desire to protect by Letters Patent-- In a door-check, the combination, substantially as set forth, of a shell or casing adapted to be attached vertically to the lower part of a door, a downwardly-prejecting bolt carried by the casing, a Jfriction-pad secured to the outer end of the bolt, a spring Within the easing, a shoulder on the lower portion of the bolt adapted to receive the spring-pressure, a shoulder in the upper portion of the casing to receive the reaction of the spring, a handle projecting laterally from the bolt, a retaining-catch in the casing to engage. the handle, a sliding sleeve carried by the bolt and interposed between the upper end of the spring and the shoulder against which it reacts,'and an external handle for controlling 'the sleeve.

In testimony whereof I affix my signature in 3 5 Witnesses:

F.F. GILBERT, JOHN S. VARLEY. 

